Nature of Light
Learning Objectives
- Students will be able to describe light as electromagnetic radiation
- Students will be able to explain the wave-particle duality of light
- Students will be able to identify practical consequences of the speed of light
Core Concepts
- electromagnetic_radiation
- speed_of_light
- photon
- wave_properties
- particle_properties
- visible_spectrum
Formulas
$$c = \lambda f$$
Speed of light related to wavelength and frequency
$$E = hf$$
Energy of a photon (h is Planck's constant = 6.63×10⁻³⁴ J·s)
Units
| meter per second | m/s (c = 3×10⁸ m/s in vacuum) |
| nanometer | nm |
Interesting Fact
Light from distant stars took years to reach us; we see them as they were in the past
Key Scientist
Christiaan Huygens
Developed wave theory of light
Ancient Wisdom
Light symbolizes truth in virtually all traditions; physics reveals that light has hidden depths (wave-particle duality) like all fundamental reality.
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